package/kernel/mac80211/patches/344-0008-brcmfmac-use-device-memsize-config-from-fw-if-define.patch

   1 From: Hante Meuleman <meuleman@broadcom.com>
   2 Date: Wed, 17 Feb 2016 11:26:57 +0100
   3 Subject: [PATCH] brcmfmac: use device memsize config from fw if defined
   4
   5 Newer type pcie devices have memory which get shared between fw and
   6 hw. The division of this memory is done firmware compile time. As a
   7 result the ramsize as used by driver needs to be adjusted for this.
   8 This is done by reading the memory size from the firmware.
   9
  10 Reviewed-by: Arend Van Spriel <arend@broadcom.com>
  11 Reviewed-by: Franky (Zhenhui) Lin <frankyl@broadcom.com>
  12 Reviewed-by: Pieter-Paul Giesberts <pieterpg@broadcom.com>
  13 Signed-off-by: Hante Meuleman <meuleman@broadcom.com>
  14 Signed-off-by: Arend van Spriel <arend@broadcom.com>
  15 Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
  16 ---
  17
  18 --- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/pcie.c
  19 +++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/pcie.c
  20 @@ -207,6 +207,10 @@ static struct brcmf_firmware_mapping brc
  21  #define BRCMF_PCIE_CFGREG_REG_BAR3_CONFIG      0x4F4
  22  #define BRCMF_PCIE_LINK_STATUS_CTRL_ASPM_ENAB  3
  23
  24 +/* Magic number at a magic location to find RAM size */
  25 +#define BRCMF_RAMSIZE_MAGIC                    0x534d4152      /* SMAR */
  26 +#define BRCMF_RAMSIZE_OFFSET                   0x6c
  27 +
  28
  29  struct brcmf_pcie_console {
  30         u32 base_addr;
  31 @@ -1412,6 +1416,28 @@ static const struct brcmf_bus_ops brcmf_
  32  };
  33
  34
  35 +static void
  36 +brcmf_pcie_adjust_ramsize(struct brcmf_pciedev_info *devinfo, u8 *data,
  37 +                         u32 data_len)
  38 +{
  39 +       __le32 *field;
  40 +       u32 newsize;
  41 +
  42 +       if (data_len < BRCMF_RAMSIZE_OFFSET + 8)
  43 +               return;
  44 +
  45 +       field = (__le32 *)&data[BRCMF_RAMSIZE_OFFSET];
  46 +       if (le32_to_cpup(field) != BRCMF_RAMSIZE_MAGIC)
  47 +               return;
  48 +       field++;
  49 +       newsize = le32_to_cpup(field);
  50 +
  51 +       brcmf_dbg(PCIE, "Found ramsize info in FW, adjusting to 0x%x\n",
  52 +                 newsize);
  53 +       devinfo->ci->ramsize = newsize;
  54 +}
  55 +
  56 +
  57  static int
  58  brcmf_pcie_init_share_ram_info(struct brcmf_pciedev_info *devinfo,
  59                                u32 sharedram_addr)
  60 @@ -1694,6 +1720,13 @@ static void brcmf_pcie_setup(struct devi
  61
  62         brcmf_pcie_attach(devinfo);
  63
  64 +       /* Some of the firmwares have the size of the memory of the device
  65 +        * defined inside the firmware. This is because part of the memory in
  66 +        * the device is shared and the devision is determined by FW. Parse
  67 +        * the firmware and adjust the chip memory size now.
  68 +        */
  69 +       brcmf_pcie_adjust_ramsize(devinfo, (u8 *)fw->data, fw->size);
  70 +
  71         ret = brcmf_pcie_download_fw_nvram(devinfo, fw, nvram, nvram_len);
  72         if (ret)
  73                 goto fail;